openmp: Fix up handling of OMP_PLACES=threads(1)

openmp: Fix up handling of OMP_PLACES=threads(1)

When writing the places-*.c tests, I've noticed that we mishandle threads
abstract name with specified num-places if num-places isn't a multiple of
number of hw threads in a core.  It then happily ignores the maximum count
and overwrites for the remaining hw threads in a core further places that
haven't been allocated.

2021-10-15  Jakub Jelinek  <jakub@redhat.com>

	* config/linux/affinity.c (gomp_affinity_init_level_1): For level 1
	after creating count places clean up and return immediately.
	* testsuite/libgomp.c/places-6.c: New test.
	* testsuite/libgomp.c/places-7.c: New test.
	* testsuite/libgomp.c/places-8.c: New test.
	* testsuite/libgomp.c/places-9.c: New test.
	* testsuite/libgomp.c/places-10.c: New test.